diff --git a/app/config/sculpin_kernel.yml b/app/config/sculpin_kernel.yml
index 49f6e1230..fd1d232ab 100644
--- a/app/config/sculpin_kernel.yml
+++ b/app/config/sculpin_kernel.yml
@@ -8,3 +8,11 @@ sculpin_content_types:
     permalink: /blog/:basename/
   presentations:
     permalink: /presentations/:basename/
+
+services:
+  App\Experience\TwigExtension\ExperienceTwigExtension:
+    tags:
+      - {name: twig.extension}
+  App\Presentation\TwigExtension\PresentationTwigExtension:
+    tags:
+      - {name: twig.extension}
diff --git a/composer.json b/composer.json
index ab2796ef2..f90b60042 100644
--- a/composer.json
+++ b/composer.json
@@ -8,5 +8,18 @@
         "allow-plugins": {
             "sculpin/sculpin-theme-composer-plugin": true
        }
+    },
+    "autoload": {
+        "psr-4": {
+            "App\\": "src/"
+        }
+    },
+    "autoload-dev": {
+        "psr-4": {
+            "Tests\\": "tests/"
+        }
+    },
+    "require-dev": {
+        "phpunit/phpunit": "^12.1"
     }
 }
diff --git a/composer.lock b/composer.lock
index c7a31f952..e90a41f87 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "910019ed15f62fccc7241d065627ac72",
+    "content-hash": "4811731ac9f6bfcb3d81d35eff8a3b67",
     "packages": [
         {
             "name": "dflydev/ant-path-matcher",
@@ -3802,13 +3802,1604 @@
             "time": "2017-05-11T10:04:12+00:00"
         }
     ],
-    "packages-dev": [],
+    "packages-dev": [
+        {
+            "name": "myclabs/deep-copy",
+            "version": "1.13.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/myclabs/DeepCopy.git",
+                "reference": "1720ddd719e16cf0db4eb1c6eca108031636d46c"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/myclabs/DeepCopy/zipball/1720ddd719e16cf0db4eb1c6eca108031636d46c",
+                "reference": "1720ddd719e16cf0db4eb1c6eca108031636d46c",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^7.1 || ^8.0"
+            },
+            "conflict": {
+                "doctrine/collections": "<1.6.8",
+                "doctrine/common": "<2.13.3 || >=3 <3.2.2"
+            },
+            "require-dev": {
+                "doctrine/collections": "^1.6.8",
+                "doctrine/common": "^2.13.3 || ^3.2.2",
+                "phpspec/prophecy": "^1.10",
+                "phpunit/phpunit": "^7.5.20 || ^8.5.23 || ^9.5.13"
+            },
+            "type": "library",
+            "autoload": {
+                "files": [
+                    "src/DeepCopy/deep_copy.php"
+                ],
+                "psr-4": {
+                    "DeepCopy\\": "src/DeepCopy/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "description": "Create deep copies (clones) of your objects",
+            "keywords": [
+                "clone",
+                "copy",
+                "duplicate",
+                "object",
+                "object graph"
+            ],
+            "support": {
+                "issues": "https://github.com/myclabs/DeepCopy/issues",
+                "source": "https://github.com/myclabs/DeepCopy/tree/1.13.1"
+            },
+            "funding": [
+                {
+                    "url": "https://tidelift.com/funding/github/packagist/myclabs/deep-copy",
+                    "type": "tidelift"
+                }
+            ],
+            "time": "2025-04-29T12:36:36+00:00"
+        },
+        {
+            "name": "nikic/php-parser",
+            "version": "v5.4.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/nikic/PHP-Parser.git",
+                "reference": "447a020a1f875a434d62f2a401f53b82a396e494"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/nikic/PHP-Parser/zipball/447a020a1f875a434d62f2a401f53b82a396e494",
+                "reference": "447a020a1f875a434d62f2a401f53b82a396e494",
+                "shasum": ""
+            },
+            "require": {
+                "ext-ctype": "*",
+                "ext-json": "*",
+                "ext-tokenizer": "*",
+                "php": ">=7.4"
+            },
+            "require-dev": {
+                "ircmaxell/php-yacc": "^0.0.7",
+                "phpunit/phpunit": "^9.0"
+            },
+            "bin": [
+                "bin/php-parse"
+            ],
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "5.0-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "PhpParser\\": "lib/PhpParser"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Nikita Popov"
+                }
+            ],
+            "description": "A PHP parser written in PHP",
+            "keywords": [
+                "parser",
+                "php"
+            ],
+            "support": {
+                "issues": "https://github.com/nikic/PHP-Parser/issues",
+                "source": "https://github.com/nikic/PHP-Parser/tree/v5.4.0"
+            },
+            "time": "2024-12-30T11:07:19+00:00"
+        },
+        {
+            "name": "phar-io/manifest",
+            "version": "2.0.4",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/phar-io/manifest.git",
+                "reference": "54750ef60c58e43759730615a392c31c80e23176"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/phar-io/manifest/zipball/54750ef60c58e43759730615a392c31c80e23176",
+                "reference": "54750ef60c58e43759730615a392c31c80e23176",
+                "shasum": ""
+            },
+            "require": {
+                "ext-dom": "*",
+                "ext-libxml": "*",
+                "ext-phar": "*",
+                "ext-xmlwriter": "*",
+                "phar-io/version": "^3.0.1",
+                "php": "^7.2 || ^8.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "2.0.x-dev"
+                }
+            },
+            "autoload": {
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+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Arne Blankerts",
+                    "email": "arne@blankerts.de",
+                    "role": "Developer"
+                },
+                {
+                    "name": "Sebastian Heuer",
+                    "email": "sebastian@phpeople.de",
+                    "role": "Developer"
+                },
+                {
+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de",
+                    "role": "Developer"
+                }
+            ],
+            "description": "Component for reading phar.io manifest information from a PHP Archive (PHAR)",
+            "support": {
+                "issues": "https://github.com/phar-io/manifest/issues",
+                "source": "https://github.com/phar-io/manifest/tree/2.0.4"
+            },
+            "funding": [
+                {
+                    "url": "https://github.com/theseer",
+                    "type": "github"
+                }
+            ],
+            "time": "2024-03-03T12:33:53+00:00"
+        },
+        {
+            "name": "phar-io/version",
+            "version": "3.2.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/phar-io/version.git",
+                "reference": "4f7fd7836c6f332bb2933569e566a0d6c4cbed74"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/phar-io/version/zipball/4f7fd7836c6f332bb2933569e566a0d6c4cbed74",
+                "reference": "4f7fd7836c6f332bb2933569e566a0d6c4cbed74",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^7.2 || ^8.0"
+            },
+            "type": "library",
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Arne Blankerts",
+                    "email": "arne@blankerts.de",
+                    "role": "Developer"
+                },
+                {
+                    "name": "Sebastian Heuer",
+                    "email": "sebastian@phpeople.de",
+                    "role": "Developer"
+                },
+                {
+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de",
+                    "role": "Developer"
+                }
+            ],
+            "description": "Library for handling version information and constraints",
+            "support": {
+                "issues": "https://github.com/phar-io/version/issues",
+                "source": "https://github.com/phar-io/version/tree/3.2.1"
+            },
+            "time": "2022-02-21T01:04:05+00:00"
+        },
+        {
+            "name": "phpunit/php-code-coverage",
+            "version": "12.2.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/sebastianbergmann/php-code-coverage.git",
+                "reference": "448f2c504d86dbff3949dcd02c95aa85db2c7617"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/sebastianbergmann/php-code-coverage/zipball/448f2c504d86dbff3949dcd02c95aa85db2c7617",
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+                "shasum": ""
+            },
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+                "ext-libxml": "*",
+                "ext-xmlwriter": "*",
+                "nikic/php-parser": "^5.4.0",
+                "php": ">=8.3",
+                "phpunit/php-file-iterator": "^6.0",
+                "phpunit/php-text-template": "^5.0",
+                "sebastian/complexity": "^5.0",
+                "sebastian/environment": "^8.0",
+                "sebastian/lines-of-code": "^4.0",
+                "sebastian/version": "^6.0",
+                "theseer/tokenizer": "^1.2.3"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^12.1"
+            },
+            "suggest": {
+                "ext-pcov": "PHP extension that provides line coverage",
+                "ext-xdebug": "PHP extension that provides line coverage as well as branch and path coverage"
+            },
+            "type": "library",
+            "extra": {
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+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
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+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de",
+                    "role": "lead"
+                }
+            ],
+            "description": "Library that provides collection, processing, and rendering functionality for PHP code coverage information.",
+            "homepage": "https://github.com/sebastianbergmann/php-code-coverage",
+            "keywords": [
+                "coverage",
+                "testing",
+                "xunit"
+            ],
+            "support": {
+                "issues": "https://github.com/sebastianbergmann/php-code-coverage/issues",
+                "security": "https://github.com/sebastianbergmann/php-code-coverage/security/policy",
+                "source": "https://github.com/sebastianbergmann/php-code-coverage/tree/12.2.1"
+            },
+            "funding": [
+                {
+                    "url": "https://github.com/sebastianbergmann",
+                    "type": "github"
+                },
+                {
+                    "url": "https://liberapay.com/sebastianbergmann",
+                    "type": "liberapay"
+                },
+                {
+                    "url": "https://thanks.dev/u/gh/sebastianbergmann",
+                    "type": "thanks_dev"
+                },
+                {
+                    "url": "https://tidelift.com/funding/github/packagist/phpunit/php-code-coverage",
+                    "type": "tidelift"
+                }
+            ],
+            "time": "2025-05-04T05:25:05+00:00"
+        },
+        {
+            "name": "phpunit/php-file-iterator",
+            "version": "6.0.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/sebastianbergmann/php-file-iterator.git",
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+                    "email": "sebastian@phpunit.de",
+                    "role": "lead"
+                }
+            ],
+            "description": "FilterIterator implementation that filters files based on a list of suffixes.",
+            "homepage": "https://github.com/sebastianbergmann/php-file-iterator/",
+            "keywords": [
+                "filesystem",
+                "iterator"
+            ],
+            "support": {
+                "issues": "https://github.com/sebastianbergmann/php-file-iterator/issues",
+                "security": "https://github.com/sebastianbergmann/php-file-iterator/security/policy",
+                "source": "https://github.com/sebastianbergmann/php-file-iterator/tree/6.0.0"
+            },
+            "funding": [
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+                    "url": "https://github.com/sebastianbergmann",
+                    "type": "github"
+                }
+            ],
+            "time": "2025-02-07T04:58:37+00:00"
+        },
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+            "version": "6.0.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/sebastianbergmann/php-invoker.git",
+                "reference": "12b54e689b07a25a9b41e57736dfab6ec9ae5406"
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+            "suggest": {
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+            "type": "library",
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+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
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+            "authors": [
+                {
+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de",
+                    "role": "lead"
+                }
+            ],
+            "description": "Invoke callables with a timeout",
+            "homepage": "https://github.com/sebastianbergmann/php-invoker/",
+            "keywords": [
+                "process"
+            ],
+            "support": {
+                "issues": "https://github.com/sebastianbergmann/php-invoker/issues",
+                "security": "https://github.com/sebastianbergmann/php-invoker/security/policy",
+                "source": "https://github.com/sebastianbergmann/php-invoker/tree/6.0.0"
+            },
+            "funding": [
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+                    "type": "github"
+                }
+            ],
+            "time": "2025-02-07T04:58:58+00:00"
+        },
+        {
+            "name": "phpunit/php-text-template",
+            "version": "5.0.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/sebastianbergmann/php-text-template.git",
+                "reference": "e1367a453f0eda562eedb4f659e13aa900d66c53"
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+            "dist": {
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+                "url": "https://api.github.com/repos/sebastianbergmann/php-text-template/zipball/e1367a453f0eda562eedb4f659e13aa900d66c53",
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+            "keywords": [
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+                "security": "https://github.com/sebastianbergmann/php-text-template/security/policy",
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+                "url": "https://github.com/sebastianbergmann/php-timer.git",
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+                "timer"
+            ],
+            "support": {
+                "issues": "https://github.com/sebastianbergmann/php-timer/issues",
+                "security": "https://github.com/sebastianbergmann/php-timer/security/policy",
+                "source": "https://github.com/sebastianbergmann/php-timer/tree/8.0.0"
+            },
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+                    "url": "https://github.com/sebastianbergmann",
+                    "type": "github"
+                }
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+                    "type": "github"
+                }
+            ],
+            "time": "2025-02-07T04:57:48+00:00"
+        },
+        {
+            "name": "sebastian/object-reflector",
+            "version": "5.0.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/sebastianbergmann/object-reflector.git",
+                "reference": "4bfa827c969c98be1e527abd576533293c634f6a"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/sebastianbergmann/object-reflector/zipball/4bfa827c969c98be1e527abd576533293c634f6a",
+                "reference": "4bfa827c969c98be1e527abd576533293c634f6a",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=8.3"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^12.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-main": "5.0-dev"
+                }
+            },
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de"
+                }
+            ],
+            "description": "Allows reflection of object attributes, including inherited and non-public ones",
+            "homepage": "https://github.com/sebastianbergmann/object-reflector/",
+            "support": {
+                "issues": "https://github.com/sebastianbergmann/object-reflector/issues",
+                "security": "https://github.com/sebastianbergmann/object-reflector/security/policy",
+                "source": "https://github.com/sebastianbergmann/object-reflector/tree/5.0.0"
+            },
+            "funding": [
+                {
+                    "url": "https://github.com/sebastianbergmann",
+                    "type": "github"
+                }
+            ],
+            "time": "2025-02-07T04:58:17+00:00"
+        },
+        {
+            "name": "sebastian/recursion-context",
+            "version": "7.0.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/sebastianbergmann/recursion-context.git",
+                "reference": "c405ae3a63e01b32eb71577f8ec1604e39858a7c"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/sebastianbergmann/recursion-context/zipball/c405ae3a63e01b32eb71577f8ec1604e39858a7c",
+                "reference": "c405ae3a63e01b32eb71577f8ec1604e39858a7c",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=8.3"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^12.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-main": "7.0-dev"
+                }
+            },
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de"
+                },
+                {
+                    "name": "Jeff Welch",
+                    "email": "whatthejeff@gmail.com"
+                },
+                {
+                    "name": "Adam Harvey",
+                    "email": "aharvey@php.net"
+                }
+            ],
+            "description": "Provides functionality to recursively process PHP variables",
+            "homepage": "https://github.com/sebastianbergmann/recursion-context",
+            "support": {
+                "issues": "https://github.com/sebastianbergmann/recursion-context/issues",
+                "security": "https://github.com/sebastianbergmann/recursion-context/security/policy",
+                "source": "https://github.com/sebastianbergmann/recursion-context/tree/7.0.0"
+            },
+            "funding": [
+                {
+                    "url": "https://github.com/sebastianbergmann",
+                    "type": "github"
+                }
+            ],
+            "time": "2025-02-07T05:00:01+00:00"
+        },
+        {
+            "name": "sebastian/type",
+            "version": "6.0.2",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/sebastianbergmann/type.git",
+                "reference": "1d7cd6e514384c36d7a390347f57c385d4be6069"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/sebastianbergmann/type/zipball/1d7cd6e514384c36d7a390347f57c385d4be6069",
+                "reference": "1d7cd6e514384c36d7a390347f57c385d4be6069",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=8.3"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^12.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-main": "6.0-dev"
+                }
+            },
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de",
+                    "role": "lead"
+                }
+            ],
+            "description": "Collection of value objects that represent the types of the PHP type system",
+            "homepage": "https://github.com/sebastianbergmann/type",
+            "support": {
+                "issues": "https://github.com/sebastianbergmann/type/issues",
+                "security": "https://github.com/sebastianbergmann/type/security/policy",
+                "source": "https://github.com/sebastianbergmann/type/tree/6.0.2"
+            },
+            "funding": [
+                {
+                    "url": "https://github.com/sebastianbergmann",
+                    "type": "github"
+                }
+            ],
+            "time": "2025-03-18T13:37:31+00:00"
+        },
+        {
+            "name": "sebastian/version",
+            "version": "6.0.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/sebastianbergmann/version.git",
+                "reference": "3e6ccf7657d4f0a59200564b08cead899313b53c"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/sebastianbergmann/version/zipball/3e6ccf7657d4f0a59200564b08cead899313b53c",
+                "reference": "3e6ccf7657d4f0a59200564b08cead899313b53c",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=8.3"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-main": "6.0-dev"
+                }
+            },
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de",
+                    "role": "lead"
+                }
+            ],
+            "description": "Library that helps with managing the version number of Git-hosted PHP projects",
+            "homepage": "https://github.com/sebastianbergmann/version",
+            "support": {
+                "issues": "https://github.com/sebastianbergmann/version/issues",
+                "security": "https://github.com/sebastianbergmann/version/security/policy",
+                "source": "https://github.com/sebastianbergmann/version/tree/6.0.0"
+            },
+            "funding": [
+                {
+                    "url": "https://github.com/sebastianbergmann",
+                    "type": "github"
+                }
+            ],
+            "time": "2025-02-07T05:00:38+00:00"
+        },
+        {
+            "name": "staabm/side-effects-detector",
+            "version": "1.0.5",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/staabm/side-effects-detector.git",
+                "reference": "d8334211a140ce329c13726d4a715adbddd0a163"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/staabm/side-effects-detector/zipball/d8334211a140ce329c13726d4a715adbddd0a163",
+                "reference": "d8334211a140ce329c13726d4a715adbddd0a163",
+                "shasum": ""
+            },
+            "require": {
+                "ext-tokenizer": "*",
+                "php": "^7.4 || ^8.0"
+            },
+            "require-dev": {
+                "phpstan/extension-installer": "^1.4.3",
+                "phpstan/phpstan": "^1.12.6",
+                "phpunit/phpunit": "^9.6.21",
+                "symfony/var-dumper": "^5.4.43",
+                "tomasvotruba/type-coverage": "1.0.0",
+                "tomasvotruba/unused-public": "1.0.0"
+            },
+            "type": "library",
+            "autoload": {
+                "classmap": [
+                    "lib/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "description": "A static analysis tool to detect side effects in PHP code",
+            "keywords": [
+                "static analysis"
+            ],
+            "support": {
+                "issues": "https://github.com/staabm/side-effects-detector/issues",
+                "source": "https://github.com/staabm/side-effects-detector/tree/1.0.5"
+            },
+            "funding": [
+                {
+                    "url": "https://github.com/staabm",
+                    "type": "github"
+                }
+            ],
+            "time": "2024-10-20T05:08:20+00:00"
+        },
+        {
+            "name": "theseer/tokenizer",
+            "version": "1.2.3",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/theseer/tokenizer.git",
+                "reference": "737eda637ed5e28c3413cb1ebe8bb52cbf1ca7a2"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/theseer/tokenizer/zipball/737eda637ed5e28c3413cb1ebe8bb52cbf1ca7a2",
+                "reference": "737eda637ed5e28c3413cb1ebe8bb52cbf1ca7a2",
+                "shasum": ""
+            },
+            "require": {
+                "ext-dom": "*",
+                "ext-tokenizer": "*",
+                "ext-xmlwriter": "*",
+                "php": "^7.2 || ^8.0"
+            },
+            "type": "library",
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Arne Blankerts",
+                    "email": "arne@blankerts.de",
+                    "role": "Developer"
+                }
+            ],
+            "description": "A small library for converting tokenized PHP source code into XML and potentially other formats",
+            "support": {
+                "issues": "https://github.com/theseer/tokenizer/issues",
+                "source": "https://github.com/theseer/tokenizer/tree/1.2.3"
+            },
+            "funding": [
+                {
+                    "url": "https://github.com/theseer",
+                    "type": "github"
+                }
+            ],
+            "time": "2024-03-03T12:36:25+00:00"
+        }
+    ],
     "aliases": [],
     "minimum-stability": "stable",
-    "stability-flags": [],
+    "stability-flags": {},
     "prefer-stable": false,
     "prefer-lowest": false,
-    "platform": [],
-    "platform-dev": [],
+    "platform": {},
+    "platform-dev": {},
     "plugin-api-version": "2.6.0"
 }
diff --git a/phpunit.xml.dist b/phpunit.xml.dist
new file mode 100644
index 000000000..5d7855402
--- /dev/null
+++ b/phpunit.xml.dist
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" bootstrap="./vendor/autoload.php" colors="true" stopOnFailure="true" xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/11.1/phpunit.xsd" cacheDirectory=".phpunit.cache">
+  <testsuites>
+    <testsuite name="App">
+      <directory suffix="Test.php">tests</directory>
+    </testsuite>
+  </testsuites>
+</phpunit>
diff --git a/source/_includes/about-me.html.twig b/source/_includes/about-me.html.twig
index 95af4199c..77deb4952 100644
--- a/source/_includes/about-me.html.twig
+++ b/source/_includes/about-me.html.twig
@@ -10,7 +10,7 @@
       </div>
 
       <div class="{{ site.prose_classes }}">
-        <p>I'm an certified Drupal Triple Expert with {{ macros.yearsOfExperience }} years of experience, a Drupal core contributor, <a href="/presentations">public speaker</a>, <a href="{{ site.youtube.channel.url }}/streams">live streamer</a>, and host of the <a href="/podcast">Beyond Blocks podcast</a>.</p>
+        <p>I'm an certified Drupal Triple Expert with {{ get_years_of_experience() }} years of experience, a Drupal core contributor, <a href="/presentations">public speaker</a>, <a href="{{ site.youtube.channel.url }}/streams">live streamer</a>, and host of the <a href="/podcast">Beyond Blocks podcast</a>.</p>
       </div>
     </div>
   </div>
diff --git a/source/call.html.twig b/source/call.html.twig
index 5b719a4f2..9789c35d0 100644
--- a/source/call.html.twig
+++ b/source/call.html.twig
@@ -23,8 +23,6 @@ faqs:
 
 {% block content %}
 
-{% import "_macros" as macros %}
-
 {# <h2>Who is this for?</h2> #}
 
 {# Pain #}
@@ -33,7 +31,7 @@ faqs:
 
 {# Fix #}
 
-<p>As a professional Software Developer and Consultant with {{ macros.yearsOfExperience }} years of Drupal and PHP experience, I have a lot of knowledge that I use to help customers and their projects.</p>
+<p>As a professional Software Developer and Consultant with {{ get_years_of_experience() }} years of Drupal and PHP experience, I have a lot of knowledge that I use to help customers and their projects.</p>
 
 {# 1st call to action #}
 
@@ -93,7 +91,7 @@ faqs:
 <h2>Who am I?</h2>
 
 <ul>
-  <li>I'm an Acquia-certified Drupal expert with {{ macros.yearsOfExperience }} years of professional development experience.</li>
+  <li>I'm an Acquia-certified Drupal expert with {{ get_years_of_experience() }} years of professional development experience.</li>
   <li>I'm a former Drupal Association employee who was responsible for improving and maintaining Drupal.org.</li>
   <li>I'm a Drupal core contributor and maintain numerous Drupal projects, including the Override Node Options module, which is used on over 38,000 websites.</li>
   <li>I'm a multiple-time DrupalCon speaker who regularly presents talks and workshops at conferences and meetups.</li>
diff --git a/source/drupal-upgrade.md b/source/drupal-upgrade.md
index 989bfad57..47279d3f4 100644
--- a/source/drupal-upgrade.md
+++ b/source/drupal-upgrade.md
@@ -6,8 +6,6 @@ button:
     url: https://buy.stripe.com/aEU4h0gBc4ro0p27sz
 ---
 
-{% import "_macros" as macros %}
-
 {# Pain #}
 
 Drupal 7 will be unsupported on the **5th of January 2025**.
@@ -71,7 +69,7 @@ An upgrade roadmap is a personalised audit of your Drupal website and includes d
 
 ## Who am I?
 
-* I'm an Acquia-certified Drupal expert with {{ macros.yearsOfExperience }} years of professional development experience.
+* I'm an Acquia-certified Drupal expert with {{ get_years_of_experience() }} years of professional development experience.
 * I'm a former Drupal Association employee who was responsible for improving and maintaining Drupal.org.
 * I'm a Drupal core contributor and maintain numerous Drupal projects, including the Override Node Options module, which is used on over 38,000 websites.
 * I'm a multiple-time DrupalCon speaker who regularly presents talks and workshops at conferences and meetups.
diff --git a/source/pair.html.twig b/source/pair.html.twig
index f40e19755..71d865329 100644
--- a/source/pair.html.twig
+++ b/source/pair.html.twig
@@ -7,8 +7,6 @@ link: https://savvycal.com/opdavies/pair
 
 {% block content %}
 
-{% import "_macros" as macros %}
-
 {# Pain #}
 
 <p>Are you stuck adding a new feature or fixing a bug?</p>
@@ -51,7 +49,7 @@ link: https://savvycal.com/opdavies/pair
 <h2>Who am I?</h2>
 
 <ul>
-  <li>I'm an Acquia-certified Drupal expert with {{ macros.yearsOfExperience }} years of professional development experience.</li>
+  <li>I'm an Acquia-certified Drupal expert with {{ get_years_of_experience() }} years of professional development experience.</li>
   <li>I'm a former Drupal Association employee who was responsible for improving and maintaining Drupal.org.</li>
   <li>I'm a Drupal core contributor and maintain numerous Drupal projects, including the Override Node Options module, which is used on over 38,000 websites.</li>
   <li>I'm a multiple-time DrupalCon speaker who regularly presents talks and workshops at conferences and meetups.</li>
diff --git a/source/presentations.html.twig b/source/presentations.html.twig
index 83ddb0cf1..340ba0fd7 100644
--- a/source/presentations.html.twig
+++ b/source/presentations.html.twig
@@ -4,10 +4,7 @@ title: Presentations
 use: [presentations]
 ---
 
-{% set today = 'today'|date('U') %}
-{% set presentation_count = data.presentations|reduce((count, presentation) => count + (presentation.events|filter(e => e.date|date('U') < today)|length), 0) %}
-
-<p>Since September 2012, I have given {{ presentation_count }} public talks and workshops at various conferences and meetups, in-person and remotely, on topics including PHP, Drupal, automated testing, Git, CSS, and systems administration.</p>
+<p>Since September 2012, I have given {{ get_presentation_count(data.presentations) }} public talks and workshops at various conferences and meetups, in-person and remotely, on topics including PHP, Drupal, automated testing, Git, CSS, and systems administration.</p>
 
 {% for presentation in data.presentations|sort((a, b) => a.events|last.date|date('U') > b.events|last.date|date('U') ? -1 : 1) %}
   <article>
diff --git a/source/press.md b/source/press.md
index ae538e9f0..b0a2f3a6a 100644
--- a/source/press.md
+++ b/source/press.md
@@ -3,15 +3,13 @@ layout: page
 title: Press Info
 ---
 
-{% import "_macros" as macros %}
-
 The following information is provided as a cut-and-paste resource for conference organisers, media professionals, podcast hosts, and other interested parties.
 
 Please feel free to use anything here as-is without checking with me first. If you have additional questions, you can <a href="mailto:{{ site.email }}">email me directly</a>.
 
 ## Short Bio
 
-Oliver is a Software Developer and Drupal expert with {{ macros.yearsOfExperience }} years experience. He specialises in code quality, automated testing and test-driven development.
+Oliver is a Software Developer and Drupal expert with {{ get_years_of_experience() }} years experience. He specialises in code quality, automated testing and test-driven development.
 
 ## Sample Topics
 
diff --git a/source/speaker.md b/source/speaker.md
index 548101576..309ac4b3a 100644
--- a/source/speaker.md
+++ b/source/speaker.md
@@ -3,11 +3,9 @@ layout: page
 title: Speaker Information
 ---
 
-{% import "_macros" as macros %}
-
 ## Bio
 
-Oliver is a Software Developer and Drupal Expert with {{ macros.yearsOfExperience }} years of experience. As well as consulting on large Drupal projects, Oliver helps Drupal Developers learn automated testing and test-driven development via a free email course and paid coaching and workshops. He regularly contributes to open-source software projects, including Drupal core.
+Oliver is a Software Developer and Drupal Expert with {{ get_years_of_experience() }} years of experience. As well as consulting on large Drupal projects, Oliver helps Drupal Developers learn automated testing and test-driven development via a free email course and paid coaching and workshops. He regularly contributes to open-source software projects, including Drupal core.
 
 ## Photos
 
diff --git a/src/Experience/TwigExtension/ExperienceTwigExtension.php b/src/Experience/TwigExtension/ExperienceTwigExtension.php
new file mode 100644
index 000000000..56886e563
--- /dev/null
+++ b/src/Experience/TwigExtension/ExperienceTwigExtension.php
@@ -0,0 +1,29 @@
+<?php
+
+namespace App\Experience\TwigExtension;
+
+use Sculpin\Contrib\ProxySourceCollection\ProxySourceItem;
+use Twig\Extension\AbstractExtension;
+use Twig\TwigFunction;
+
+class ExperienceTwigExtension extends AbstractExtension
+{
+    private static $startYear = 2007;
+
+    public function getFunctions(): array
+    {
+        return [
+            new TwigFunction('get_years_of_experience', [$this, 'getYearsOfExperience']),
+        ];
+    }
+
+    public function getName(): string
+    {
+        return 'experience';
+    }
+
+    public function getYearsOfExperience(): int
+    {
+        return (new \DateTimeImmutable())->format('Y') - self::$startYear;
+    }
+}
diff --git a/src/Presentation/TwigExtension/PresentationTwigExtension.php b/src/Presentation/TwigExtension/PresentationTwigExtension.php
new file mode 100644
index 000000000..cb312cc5d
--- /dev/null
+++ b/src/Presentation/TwigExtension/PresentationTwigExtension.php
@@ -0,0 +1,38 @@
+<?php
+
+namespace App\Presentation\TwigExtension;
+
+use Sculpin\Contrib\ProxySourceCollection\ProxySourceItem;
+use Twig\Extension\AbstractExtension;
+use Twig\TwigFunction;
+
+class PresentationTwigExtension extends AbstractExtension
+{
+    public function getFunctions(): array
+    {
+        return [
+            new TwigFunction('get_presentation_count', [$this, 'getPresentationCount']),
+        ];
+    }
+
+    public function getName(): string
+    {
+        return 'presentations';
+    }
+
+    public function getPresentationCount(array $presentations): int
+    {
+        $today = (new \DateTime('today'))->getTimestamp();
+
+        return collect($presentations)
+            ->flatMap(fn (ProxySourceItem $presentation) => $presentation->data()->get('events'))
+            ->filter(
+                function (array $event) use ($today): bool {
+                    assert(array_key_exists(array: $event, key: 'date'));
+
+                    return $event['date'] < $today;
+                }
+            )
+            ->count();
+    }
+}
diff --git a/tests/Presentation/TwigExtension/PresentationTwigExtensionTest.php b/tests/Presentation/TwigExtension/PresentationTwigExtensionTest.php
new file mode 100644
index 000000000..767873338
--- /dev/null
+++ b/tests/Presentation/TwigExtension/PresentationTwigExtensionTest.php
@@ -0,0 +1,141 @@
+<?php
+
+namespace Tests\Presentation\TwigExtension;
+
+use App\Presentation\TwigExtension\PresentationTwigExtension;
+use Dflydev\DotAccessConfiguration\Configuration;
+use PHPUnit\Framework\TestCase;
+use Sculpin\Contrib\ProxySourceCollection\ProxySourceItem;
+
+class PresentationTwigExtensionTest extends TestCase
+{
+    private PresentationTwigExtension $extension;
+
+    public function setUp(): void
+    {
+        $this->extension = new PresentationTwigExtension();
+    }
+
+    public function testNoPastEvents(): void
+    {
+        $presentation = $this->createPresentation(
+            events: [
+                ['date' => (new \DateTime('+1 days'))->getTimestamp()],
+            ],
+        );
+
+        $this->assertPresentationCount(expectedCount: 0, presentations: [$presentation]);
+    }
+
+    public function testSinglePastEvent(): void
+    {
+        $presentationA = $this->createPresentation(
+            events: [
+                ['date' => (new \DateTime('+1 days'))->getTimestamp()],
+            ],
+        );
+
+        $presentationB = $this->createPresentation(
+            events: [
+                ['date' => (new \DateTime('-3 days'))->getTimestamp()],
+            ],
+        );
+
+        $this->assertPresentationCount(expectedCount: 1, presentations: [$presentationA, $presentationB]);
+    }
+
+    public function testSinglePresentationWithMultiplePastEvents(): void
+    {
+        $presentation = $this->createPresentation(
+            events: [
+                ['date' => (new \DateTime('-1 days'))->getTimestamp()],
+                ['date' => (new \DateTime('-1 week'))->getTimestamp()],
+                ['date' => (new \DateTime('-1 year'))->getTimestamp()],
+            ],
+        );
+
+        $this->assertPresentationCount(expectedCount: 3, presentations: [$presentation]);
+    }
+
+    public function testSinglePresentationWithMultiplePastAndFutureEvents(): void
+    {
+        $presentation = $this->createPresentation(
+            events: [
+                ['date' => (new \DateTime('+1 day'))->getTimestamp()],
+                ['date' => (new \DateTime('-1 day'))->getTimestamp()],
+                ['date' => (new \DateTime('-1 week'))->getTimestamp()],
+                ['date' => (new \DateTime('+1 year'))->getTimestamp()],
+                ['date' => (new \DateTime('-1 year'))->getTimestamp()],
+            ],
+        );
+
+        $this->assertPresentationCount(expectedCount: 3, presentations: [$presentation]);
+    }
+
+    public function testMultiplePastEvents(): void
+    {
+        $presentationA = $this->createPresentation(
+            events: [
+                ['date' => (new \DateTime('-1 days'))->getTimestamp()],
+                ['date' => (new \DateTime('+1 days'))->getTimestamp()],
+            ],
+        );
+
+        $presentationB = $this->createPresentation(
+            events: [
+                ['date' => (new \DateTime('-3 days'))->getTimestamp()],
+            ],
+        );
+
+        $this->assertPresentationCount(expectedCount: 2, presentations: [$presentationA, $presentationB]);
+    }
+
+    public function testTheCurrentDayIsNotCounted(): void
+    {
+        $presentationA = $this->createPresentation(
+            events: [
+                ['date' => (new \DateTime('yesterday'))->getTimestamp()],
+                ['date' => (new \DateTime('today'))->getTimestamp()],
+            ],
+        );
+
+        $presentationB = $this->createPresentation(
+            events: [
+                ['date' => (new \DateTime('today'))->getTimestamp()],
+            ],
+        );
+
+        $presentationC = $this->createPresentation(
+            events: [
+                ['date' => (new \DateTime('yesterday'))->getTimestamp()],
+            ],
+        );
+
+        $this->assertPresentationCount(expectedCount: 2, presentations: [$presentationA, $presentationB, $presentationC]);
+    }
+
+    /**
+     * Assert the extension uses the correct number of presentations.
+     */
+    private function assertPresentationCount(int $expectedCount, array $presentations): void
+    {
+        self::assertSame(
+            actual: $this->extension->getPresentationCount($presentations),
+            expected: $expectedCount,
+        );
+    }
+
+    /**
+     * Create a mock presentation with a list of events.
+     */
+    private function createPresentation(array $events): ProxySourceItem
+    {
+        $configuration = $this->createMock(Configuration::class);
+        $configuration->method('get')->with($this->identicalTo('events'))->willReturn($events);
+
+        $presentation = $this->createMock(ProxySourceItem::class);
+        $presentation->method('data')->willReturn($configuration);
+
+        return $presentation;
+    }
+}